import {
  document,
	window,
	HTMLCanvasElement,
	requestAnimationFrame,
	cancelAnimationFrame,
core,
	Event,
  Event0
} from "dhtml-weixin"
import * as THREE from './three/Three';

import { OutlineEffect } from './three/addons/effects/OutlineEffect.js';
import { MMDLoader } from 'three/addons/loaders/MMDLoader.js';
import { MMDAnimationHelper } from 'three/addons/animation/MMDAnimationHelper.js';

var requestId
Page({
  onShareAppMessage(){
    return getApp().onShare()
  },
  onShareTimeline(){
     return {title:"ThreeX 2.0"}
  },
	onUnload() {
		cancelAnimationFrame(requestId, this.canvas)
		this.worker && this.worker.terminate()
if(this.canvas) this.canvas = null
		setTimeout(() => {
			if (this.renderer instanceof THREE.WebGLRenderer) {
				this.renderer.dispose()
				this.renderer.forceContextLoss()
				this.renderer.context = null
				this.renderer.domElement = null
				this.renderer = null
			}
		}, 0)
	},
  webgl_touch(e){
		const web_e = (window.platform=="devtools"?Event:Event0).fix(e)
		this.canvas.dispatchEvent(web_e)
  },
  onLoad() {
		document.createElementAsync("canvas", "webgl2").then(canvas => {
      this.canvas = canvas
      this.body_load(canvas).then()
    })
  },
  async body_load(canvas3d) {	
    
    var Ammo = require("./three/ammo/index.js")
  	let mesh, camera, scene, renderer, effect;
			let helper;

			let ready = false;

			const clock = new THREE.Clock();

			const startButton = document.getElementById( 'startButton' );
			startButton.addEventListener( 'click', function () {

				Ammo().then( function () {

					init();
					animate();

				} );

			} );

			function init() {

				const overlay = document.getElementById( 'overlay' );
				overlay.remove();

				const container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 2000 );

				// scene

				scene = new THREE.Scene();
				scene.background = new THREE.Color( 0xffffff );

				scene.add( new THREE.PolarGridHelper( 30, 0 ) );

				const listener = new THREE.AudioListener();
				camera.add( listener );
				scene.add( camera );

				const ambient = new THREE.AmbientLight( 0xaaaaaa, 3 );
				scene.add( ambient );

				const directionalLight = new THREE.DirectionalLight( 0xffffff, 3 );
				directionalLight.position.set( - 1, 1, 1 ).normalize();
				scene.add( directionalLight );

				//

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );

				effect = new OutlineEffect( renderer );

				// model

				function onProgress( xhr ) {

					if ( xhr.lengthComputable ) {

						const percentComplete = xhr.loaded / xhr.total * 100;
						console.log( Math.round( percentComplete, 2 ) + '% downloaded' );

					}

				}

				const modelFile = 'models/mmd/miku/miku_v2.pmd';
				const vmdFiles = [ 'models/mmd/vmds/wavefile_v2.vmd' ];
				const cameraFiles = [ 'models/mmd/vmds/wavefile_camera.vmd' ];
				const audioFile = 'models/mmd/audios/wavefile_short.mp3';
				const audioParams = { delayTime: 160 * 1 / 30 };

				helper = new MMDAnimationHelper();

				const loader = new MMDLoader();

				loader.loadWithAnimation( modelFile, vmdFiles, function ( mmd ) {

					mesh = mmd.mesh;

					helper.add( mesh, {
						animation: mmd.animation,
						physics: true
					} );

					loader.loadAnimation( cameraFiles, camera, function ( cameraAnimation ) {

						helper.add( camera, {
							animation: cameraAnimation
						} );

						new THREE.AudioLoader().load( audioFile, function ( buffer ) {

							const audio = new THREE.Audio( listener ).setBuffer( buffer );

							helper.add( audio, audioParams );
							scene.add( mesh );

							ready = true;

						}, onProgress, null );

					}, onProgress, null );

				}, onProgress, null );

				//

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				effect.setSize( window.innerWidth, window.innerHeight );

			}

			//

			function animate() {

				requestAnimationFrame( animate );
				render();

			}

			function render() {

				if ( ready ) {

					helper.update( clock.getDelta() );

				}

				effect.render( scene, camera );

			}
  }
})